syntax = "proto3";
package zed.messages;

message Envelope {
    uint32 id = 1;
    optional uint32 responding_to = 2;
    optional uint32 original_sender_id = 3;
    oneof payload {
        Auth auth = 4;
        AuthResponse auth_response = 5;
        ShareWorktree share_worktree = 6;
        ShareWorktreeResponse share_worktree_response = 7;
        OpenWorktree open_worktree = 8;
        OpenWorktreeResponse open_worktree_response = 9;
        OpenBuffer open_buffer = 10;
        OpenBufferResponse open_buffer_response = 11;
        CloseBuffer close_buffer = 12;
        UpdateBuffer update_buffer = 13;
        RemoveGuest remove_guest = 14;
    }
}

message Auth {
    int32 user_id = 1;
    string access_token = 2;
}

message AuthResponse {
    bool credentials_valid = 1;
}

message ShareWorktree {
    Worktree worktree = 1;
}

message ShareWorktreeResponse {
    uint64 worktree_id = 1;
    string access_token = 2;
}

message OpenWorktree {
    uint64 worktree_id = 1;
    string access_token = 2;
}

message OpenWorktreeResponse {
    Worktree worktree = 1;
    optional uint32 replica_id = 2;
}

message AddGuest {
    uint64 worktree_id = 1;
    uint32 replica_id = 2;
    User user = 3;
}

message RemoveGuest {
    uint64 worktree_id = 1;
    uint32 peer_id = 2;
    uint32 replica_id = 3;
}

message OpenBuffer {
    uint64 worktree_id = 1;
    string path = 2;
}

message OpenBufferResponse {
    Buffer buffer = 1;
}

message CloseBuffer {
    uint64 worktree_id = 1;
    uint64 buffer_id = 2;
}

message UpdateBuffer {
    uint64 worktree_id = 1;
    uint64 buffer_id = 2;
    repeated Operation operations = 3;
}

message User {
    uint64 id = 1;
    string github_login = 2;
    string avatar_url = 3;
}

message Worktree {
    string root_name = 1;
    repeated Entry entries = 2;
}

message Entry {
    bool is_dir = 1;
    string path = 2;
    uint64 inode = 3;
    Timestamp mtime = 4;
    bool is_symlink = 5;
    bool is_ignored = 6;
}

message Buffer {
    uint64 id = 1;
    string content = 2;
    repeated Operation.Edit history = 3;
}

message Selection {
    uint64 id = 1;
    Anchor start = 2;
    Anchor end = 3;
    bool reversed = 4;
}

message Anchor {
    repeated VectorClockEntry version = 1;
    uint64 offset = 2;
    Bias bias = 3;
    enum Bias {
        LEFT = 0;
        Right = 1;
    }
}

message Operation {
    oneof variant {
        Edit edit = 1;
        Undo undo = 2;
        UpdateSelections update_selections = 3;
        SetActiveSelections set_active_selections = 4;
    }

    message Edit {
        uint32 replica_id = 1;
        uint32 local_timestamp = 2;
        uint32 lamport_timestamp = 3;
        repeated VectorClockEntry version = 4;
        repeated Range ranges = 5;
        optional string new_text = 6;
    }

    message Undo {
        uint32 replica_id = 1;
        uint32 local_timestamp = 2;
        uint32 lamport_timestamp = 3;
        uint32 edit_replica_id = 4;
        uint32 edit_local_timestamp = 5;
        uint32 count = 6;
    }

    message UpdateSelections {
        uint32 replica_id = 1;
        uint32 local_timestamp = 2;
        uint32 lamport_timestamp = 3;
        repeated Selection selections = 4;
    }

    message SetActiveSelections {
        uint32 replica_id = 1;
        optional uint32 local_timestamp = 2;
        uint32 lamport_timestamp = 3;
    }
}

message VectorClockEntry {
    uint32 replica_id = 1;
    uint32 timestamp = 2;
}

message Timestamp {
    uint64 seconds = 1;
    uint32 nanos = 2;
}

message Range {
    uint64 start = 1;
    uint64 end = 2;
}